Fixed verifySmsCode.
Fixed link.
Fixed rest api.
add some new comments.
update REST API description for cloud code run func
add AVGroupEvent tips
add leanchat
Update error code
Added dotNet sdk api doc.
update Javascript cross domain support.
Merge pull request #31 from leancloud/leanchat

add leanchat
comment .net api index
do not comment .net guide index
tweak words in leanchat part
tweak words in leanchat part
update for proguard for android
Merge pull request #33 from leancloud/wujun_wp

Wujun wp
Merge pull request #32 from leancloud/rest_api_wujun

update JavaScript cross domain support.
Merge pull request #30 from leancloud/cloudcode_by_wujun

add some new comments.
Added targetClassName.